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masscan project preview
Developer ToolsAlternative to ShodanAlternative to ZMapAlternative to Nmap

masscan

TCP port scanner that can scan the entire Internet in under 5 minutes.

View on GitHub
LicenseAGPL-3.0
GitHub stars23.5k
Last commit1 weeks ago
Tags6 topics
Internet ScannerC SecurityPort ScannerSecurityNetwork ReconAsynchronous Packets
Overview

Why consider masscan?

masscan is the world’s fastest Internet-scale TCP port scanner written in C by Robert David Graham. Utilizing custom asynchronous network packet drivers, masscan transmits up to 10 million packets per second, enabling full-Internet port scans in under 5 minutes.

Guided learning

Learn masscan by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of masscan

masscan scans massive CIDR IP ranges with asynchronous high-rate raw SYN packet generation.

Quickstart

bash
1sudo masscan -p80,443 192.168.1.0/24 --rate=1000

masscan is licensed under the GNU AGPL-3.0 license.

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masscan FAQs

masscan is listed as a Developer Tools tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

masscan is listed under the AGPL-3.0 license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

masscan is listed as an alternative to Shodan. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.